LM43603PWPEVM: 3.3V @ 3A, 3.5 ~ 36V in, Buck


The Texas Instruments LM43603EVM evaluation module (EVM) helps designers evaluate the operation and performance of the LM43603 wide-input voltage Simple Switcher® buck regulator. The device offers configurability in a 1-V to 28-V output voltage, synchronous rectification and a 200-kHz to 2.2-MHz adjustable frequency range. It also offers external frequency synchronization, power good (PG) flag, and a precision enable to program undervoltage lockout (UVLO) and internal compensation.

The LM43603EVM is configured for an output voltage of 3.3 V and a switching frequency of 500 kHz.

Refer to the LM43603 datasheet for additional features, detailed description and available options.


Manufacturer Texas Instruments
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number 296-37858-ND
Eval Board Supplier Texas Instruments
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 3.3 V
Current Out 3 A
Voltage In 3.5 ~ 36 V
Efficiency @ Conditions >85%, 5 Vin, 3.3 V @ 0.035 ~ 3 A
>79%, 12 Vin, 3.3 V @ 0.001 ~ 3 A
>72%, 24 Vin, 3.3 V @ 0.001 ~ 3A
Voltage Out Range 1 ~ 28 V
Features Current Limit (Adj. or Fixed)
Power Good Output
Pre-Biased Startup
Short Circuit Protection
Shutdown, Enable, Standby
Soft Start
Thermal Protection
Under Voltage Protection, Brown-Out
Voltage Tracking
Switching Frequency 500 kHz
Standby Current [Typical] 1.2 µA
Quiescent Current [Typical] 5 µA
Component Count + Extras 27 + 14
Internal Switch Yes
Design Author Texas Instruments
Application / Target Market Automotive
Auxiliary Power Supply
Industrial Power
Point of Load (PoL)
Standby Current [Maximum] 3.1 µA
Quiescent Current [Maximum] 10 µA
Main I.C. Base Part LM43603
Date Created By Author 2014-03
Date Added To Library 2015-06

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